fix(install): download prebuilt wasm-opt binary on Windows arm64

CHANGELOG.md

@@ -19,6 +19,14 @@
 
     [pull/1585]: https://github.com/wasm-bindgen/wasm-pack/pull/1585
 
+  - **Download prebuilt wasm-opt binary on Windows aarch64/arm64 - [pull/1605]**
+
+    wasm-pack now downloads prebuilt `wasm-opt` binaries for Windows on AARCH64/ARM64
+    (`arm64-windows`) from Binaryen releases instead of failing with an
+    unrecognized target error.
+
+    [pull/1605]: https://github.com/wasm-bindgen/wasm-pack/pull/1605
+
 ## 🌷 0.15.0
 
 - ### ✨ Features

src/install/mod.rs

@@ -184,6 +184,7 @@ pub fn prebuilt_url_for(tool: &Tool, version: &str, arch: &Arch, os: &Os) -> Res
         (Os::MacOS, Arch::AArch64, _) => "aarch64-apple-darwin",
         (Os::Windows, Arch::X86_64, Tool::WasmOpt) => "x86_64-windows",
         (Os::Windows, Arch::X86_64, _) => "x86_64-pc-windows-msvc",
+        (Os::Windows, Arch::AArch64, Tool::WasmOpt) => "arm64-windows",
         _ => bail!("Unrecognized target!"),
     };
     match tool {

tests/all/download.rs

@@ -62,6 +62,7 @@ fn can_download_prebuilt_cargo_generate() {
     all(target_os = "macos", target_arch = "x86_64"),
     all(target_os = "macos", target_arch = "aarch64"),
     all(windows, target_arch = "x86_64"),
+    all(windows, target_arch = "aarch64"),
 ))]
 fn can_download_prebuilt_wasm_opt() {
     let dir = tempfile::TempDir::new().unwrap();